<template>
<div>
  <h1>{{title}}</h1>
  <h1>{{msg}}</h1>
  <h1 @click="$emit('childClick',msg)">提示</h1>
  <button @click="sendMsg()">发送Child组件的消息</button>
</div>
</template>

<script>
import { ref } from "vue";
import bus from "vue3-eventbus";
export default {
    props:{
      title:String
    },
    setup(){
      const msg = ref("我是子组件的值");
      const sendMsg = () =>{
        console.log("发送Child组件的消息")
        bus.emit("getMsg","我是来自Child组件的消息")
      }
      return{
        msg,
        sendMsg
      };
    }
};
</script>